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A kind of comb-type disperse dye dispersant and preparation method thereof

A technology of disperse dyes and dispersants, which is applied in the fields of dyeing, textiles and papermaking, etc. It can solve the problems of self-dispersion reduction, dispersant release, and intensified hydration, so as to improve anchoring stability, improve steric hindrance, Tolerance-enhancing effect

Active Publication Date: 2022-07-15
SHANGHAI YUKING WATER SOLUBLE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dyeing effect of disperse dyes is effectively improved under high temperature and high pressure, it also brings greater and higher demand for dispersants for disperse dyes. Due to high temperature and high pressure, the self-dispersibility of dyes decreases, and dye particles are easier to agglomerate. Coagulate into coarse particles, and at the same time, most of the existing dispersants will be easily released from the water solvent system due to the intensification of molecular motion and the intensification of hydration under high temperature and high pressure systems, greatly reducing the impact on dye particles. The dispersion and protection effect of the dye further intensifies the agglomeration and coagulation of the dye particles, leading to problems such as thickening of the dye solution, paste, and dyeing color spots.
In addition, due to the differences in the dye production process of different manufacturers, the large differences in the dye impurity components and other aspects are caused. The applicability of the same dispersant to different manufacturers is very different. demand more

Method used

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  • A kind of comb-type disperse dye dispersant and preparation method thereof
  • A kind of comb-type disperse dye dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Under nitrogen protection, add 70 parts of polyethylene glycol ether monomethyl ether (EO=40) and 5 parts of cyclopentanol, heat to 80°C, after completely dissolving, add 10 parts of styrene maleic anhydride copolymer, Mn=2000, MA accounted for 35%, the temperature was raised to 120°C, and the dissolution was complete.

[0028] 2. Add 1 part of catalyst propionic acid, and keep the reaction for 5 hours.

[0029] 3. Cool the temperature to 100°C, add 0.1 part of cross-linking agent carboxymethyl starch, and keep the temperature for 2 hours.

[0030] 4. Add water, dilute to a solid content of 40%, and adjust pH to 5.0 to obtain the comb-shaped dispersant.

Embodiment 2

[0032] 1. Under the protection of nitrogen, add 60 parts of polyethylene glycol ether monobutyl ether (EO=70) and 10 parts of ethyl cyclohexanol, heat to 90°C, and after complete dissolution, add 20 parts of styrene maleic anhydride copolymer. parts, Mn=7500, MA accounted for 20%, and the temperature was raised to 130°C, and the dissolution was complete.

[0033] 2. Add 3 parts of catalyst sulfamic acid, and keep the reaction for 10 hours.

[0034] 3. Cool the temperature to 110°C, add 0.25 part of cross-linking agent carboxymethyl starch, and keep the temperature for 2 hours.

[0035] 4. Add water, dilute to a solid content of 60%, and adjust pH to 6.0 to obtain the comb-shaped dispersant.

Embodiment 3

[0037] 1. Under the protection of nitrogen, add 80 parts of polyethylene glycol ether monohexanol (EO=50) and 7.5 parts of butyl cyclooctanol, heat to 100 ° C, after complete dissolution, add 40 parts of styrene maleic anhydride copolymer, Mn=5000, MA accounted for 30%, and the temperature was raised to 120°C, and the dissolution was complete.

[0038] 2. Add 5 parts of catalyst 4-toluenesulfonic acid, keep the temperature for 8.5 hours.

[0039] 3. Cool the temperature to 120°C, add 0.2 part of cross-linking agent carboxymethyl starch, and keep the temperature for 3 hours.

[0040] 4. Add water, dilute to a solid content of 50%, and adjust pH to 6.5.0 to obtain the comb-shaped dispersant.

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Abstract

The invention provides a comb-type disperse dye dispersant and a preparation method thereof, which has good high temperature and high pressure resistance effect, effectively ensures the stability of dye particles of disperse dyes in the high temperature and high pressure dyeing process, reduces the agglomeration and coagulation of dye particles, and has good System adaptability. Comb-type dispersing dye dispersants include styrene maleic anhydride copolymers, polyethylene glycol ether monoalcohols, cyclic structure-containing alkyl alcohols, modified starches and catalysts. The preparation method includes: under nitrogen protection, adding polyethylene glycol ether monoalcohol and alkyl alcohol containing a cyclic structure, heating to 80-100 DEG C, after completely dissolving, adding styrene maleic anhydride copolymer, and heating up to 120 °C ~140 ℃, dissolve completely; add catalyst, heat preservation reaction for 5 to 10 hours; cool down to 100~120 ℃, add modified starch, heat preservation reaction for 2 to 3 hours; add water, dilute to solid content of 40~60%, use The sodium hydroxide solution is adjusted to pH 5.0 to 7.0, that is, it is obtained.

Description

technical field [0001] The invention belongs to the technical field of disperse dyes, and in particular relates to a comb-type disperse dye dispersant and a preparation method thereof. Background technique [0002] Disperse dyes are a kind of non-ionic dyes with relatively small molecules and no water-soluble groups in structure. When dyeing, it must use a dispersant to evenly disperse the dye in the dye solution to dye fibers such as polyester. Disperse dyes are a class of dyes developed with the development of water-based fibers. After the appearance of acetate fibers in the 1920s, it was difficult to dye with water-soluble dyes, so people synthesized a class of dyes with strong hydrophobicity, disperse dyes. With the rapid development of polyamide fibers, acrylonitrile fibers, especially polyester fibers, disperse dyes have developed rapidly. The chemical fiber textile products printed and dyed by disperse dyes have bright color, excellent washing fastness and wide ran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08J3/24C08L87/00C08L3/08D06P1/16D06P1/52D06P3/54
CPCC08G81/025C08J3/246D06P1/16D06P1/5264D06P3/54C08J2387/00C08J2403/08
Inventor 王宇朱广东陈占郭永江魏亚娜
Owner SHANGHAI YUKING WATER SOLUBLE MATERIAL TECH
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